feat(cli): Add --token option to register-account command

Allow manual account registration using a setup token from `claude setup-token`.
The --token option requires --email and creates/updates account credentials
with the provided token.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/cli/index.ts

@@ -1091,11 +1091,48 @@ export function createCli(serverHandler?: (port?: number) => Promise<void>): Com
     .description('Extract current Claude login and register as an account')
     .option('--provider <provider>', 'Provider name', 'claude')
     .option('--email <email>', 'Email (for manual registration without auto-extract)')
-    .action(async (options: { provider: string; email?: string }) => {
+    .option('--token <token>', 'Setup token from `claude setup-token` (requires --email)')
+    .action(async (options: { provider: string; email?: string; token?: string }) => {
       try {
         const client = createDefaultTrpcClient();
 
-        if (options.email) {
+        if (options.token) {
+          // Token-based registration
+          if (!options.email) {
+            console.error('Error: --email is required when using --token');
+            process.exit(1);
+          }
+
+          const credentials = JSON.stringify({
+            claudeAiOauth: { accessToken: options.token },
+          });
+          const configJson = JSON.stringify({ hasCompletedOnboarding: true });
+
+          const existing = await client.listAccounts.query();
+          const alreadyRegistered = existing.find((a: any) => a.email === options.email);
+          if (alreadyRegistered) {
+            await client.updateAccountAuth.mutate({
+              id: alreadyRegistered.id,
+              configJson,
+              credentials,
+            });
+            console.log(`Updated credentials for account: ${alreadyRegistered.id}`);
+            console.log(`  Email: ${options.email}`);
+            console.log(`  Token updated (setup token)`);
+            return;
+          }
+
+          const account = await client.addAccount.mutate({
+            email: options.email,
+            provider: options.provider,
+            configJson,
+            credentials,
+          });
+          console.log(`Registered account: ${account.id}`);
+          console.log(`  Email: ${account.email}`);
+          console.log(`  Provider: ${account.provider}`);
+          console.log(`  Auth: setup token`);
+        } else if (options.email) {
           // Manual registration — guard against duplicates
           const existing = await client.listAccounts.query();
           const alreadyRegistered = existing.find((a: any) => a.email === options.email);